A Millimeter-wave CMOS Cross-Polarization Leakage Canceller for Dual-Polarized MIMO Systems

Keywords: 60GHz, Attenuator, Cancellation, CMOS, Cross-polarization (X-pol), Dual-polarization, Isolation, Leakage, Millimeter-wave, Multiple-in-multiple-out (MIMO), Phase shifter, Variable gain amplifier

Abstract

This article introduces a power-efficient millimeter-wave CMOS cross-polarization canceller for dual-polarized multiple-in-multiple-out (MIMO) systems. The dual-polarized MIMO systems can transmit two independent data streams at the same time using a horizontally polarized and vertically polarized waves. A dual-polarized antenna provides a cross-polarization isolation, which offers spatial diversity. However, the module placement, propagation, and antenna/package non-idealities cause polarization coupling resulting in degradation of the error vector magnitude. To reduce cross-polarization leakage from these non-idealities, a power-efficient passive cross-polarization leakage cancellation path is introduced. The cross-polarization leakage canceller consists of horizontal path (H-path), vertical to horizontal cancellation (V-H C) path, vertical path (V-path), and horizontal to vertical cancellation (H-V C) path. The H-path and V-path consist of the variable gain amplifier (VGA), and the V-H C path and H-V C path consist of reflection type attenuator, 0/90° 1-bit phase shifter, 0/180° 1-bit phase shifter, and 0 to 90° continuous phase shifter. Implemented in 65 nm CMOS, the proposed cross-polarization canceller improved the cross-polarization isolation better than 21.7 dB.

Author Biographies

In Cheol Yoo, Wonkwang University

In Cheol Yoo received his B.S. degree in Department of Electronic Engineering, Wonkwang University, Iksan, Korea, in 2020, where he is currently pursuing the M. S. degree. His research interests include the millimeter wave integrated circuit design.

Dong Ouk Cho, Wonkwang University

Dong Ouk Cho received his B.S. degree in Department of Electronic Engineering, Wonkwang University, Iksan, Korea, in 2020, where he is currently pursuing the M. S. degree. His research interests include the millimeter wave integrated circuit design.

Chul Woo Byeon, Wonkwang University

Chul Woo Byeon received his Ph.D. degree in Electronic Engineering from KAIST, Deajeon, Korea, in 2013. His doctoral research concerned low-power millimeter-wave/RF integrated circuit, antenna, and package design. During 2013, he was a postdoctoral researcher at the Department of Electrical and Computer Engineering in UCSD. From 2014 to August 2015, he was a senior engineer working with Samsung DMC R&D Center, Suwon, Korea. In September 2015, he joined the Department of Electronic Engineering, Wonkwang University, Iksan, Korea, where he is currently an Associate Professor. His research interests include CMOS/SiGe RF/millimeter-wave/THz integrated circuits, antenna, package, and system design for wireless communications.

Homepage : https://sites.google.com/view/rfislab/professor

Published
2022-06-30
How to Cite
Yoo, I. C., Cho, D. O., & Byeon, C. W. (2022). A Millimeter-wave CMOS Cross-Polarization Leakage Canceller for Dual-Polarized MIMO Systems. Journal of Integrated Circuits and Systems, 8(3). https://doi.org/10.23075/jicas.2023.8.3.003
Section
Articles